基于Argo资料的西北太平洋海表面盐度对台风的响应特征分析

吴铃蔚; 凌征

doi:10.3969/j.issn.1001-909X.2015.03.001

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海洋学研究 ›› 2015, Vol. 33 ›› Issue (3) : 1-6. DOI: 10.3969/j.issn.1001-909X.2015.03.001

研究论文

基于Argo资料的西北太平洋海表面盐度对台风的响应特征分析

吴铃蔚^1,2, 凌征^*1,2

作者信息 +

Analysis of sea surface salinity response to typhoon in the Northwest Pacific based on Argo data

WU Ling-wei^1,2, LING Zheng^*1,2

Author information +

文章历史 +

摘要

基于1996—2012年西北太平洋Argo剖面浮标盐度观测资料,利用合成分析方法研究了海表面盐度对台风的响应特征。结果表明海表面盐度对台风的响应具有明显的非对称性:台风过后其路径右侧的海表面盐度显著上升;左侧的则在R₅₀内上升,R₅₀外区域普遍下降。进一步分析显示台风强度、移动速度和海洋混合层深度对海表面盐度响应特征均有较大影响。强度大或移动缓慢的台风能造成大范围的海表面盐度上升;强度小或移动快速的台风只在路径右侧造成海表面盐度上升,左侧的则普遍下降。夏季(6-9月)台风过后,海表面盐度在混合层浅的区域普遍大幅上升,在混合层深的区域则在台风路径左右两侧2R₅₀范围内小幅上升,在远离台风路径左侧区域下降。

Abstract

Based on sea surface salinity (SSS) observations from Argo profiling floats during 1996—2012, SSS response to typhoons was analyzed by a synthetic analytical method. The results show that there exists an apparent asymmetry in the SSS response to typhoons: the SSS on the right side of the track increases markedly, however on the left side,it increases within radius of 50 knots wind speed (R₅₀) while decreases outside the R₅₀. Further analyses indicate that intensity, translation speed of typhoon and ocean mixed layer depth all have significant impacts on the SSS response. Strong or slow moving typhoons can produce SSS rises in a large area, whereas SSS increases (decreases) on the right (left) side of the track during the period of weak or fast moving typhoons. In summer (Jun.-Sep.), SSS generally rises more in magnitude and area after the passage of typhoon in regions of shallow mixed layer than in deep one,where SSS rises slightly within radius of 2R₅₀ and decreases on the left side far away from typhoon track.

导出引用

吴铃蔚, 凌征. 基于Argo资料的西北太平洋海表面盐度对台风的响应特征分析[J]. 海洋学研究. 2015, 33(3): 1-6 https://doi.org/10.3969/j.issn.1001-909X.2015.03.001

WU Ling-wei, LING Zheng. Analysis of sea surface salinity response to typhoon in the Northwest Pacific based on Argo data[J]. Journal of Marine Sciences. 2015, 33(3): 1-6 https://doi.org/10.3969/j.issn.1001-909X.2015.03.001

中图分类号： P731.12

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